great work, I started a charm quilt about 10 years ago and said I might be done when I was 60, I don't think I'm going to make it before then, that's only 3 years away.
I suggest some color for your inner borarder that is not exactly any of what you have or something will disappear into the boarder. How about some kind of off white and then a darker color like your red and/or brown.